Thanks Aaron! For letting us know this! I was not aware of this option.
For other wondering what this option does, from: https://docs.geoserver.org/latest/en/user/configuration/raster_access.html#max-oversampling-factor "When dealing with reprojection, the underlying raster read operation might do some oversampling in order to provide the requested output resolution" Regards, Richard Duivenvoorde On 3/3/21 7:09 AM, Sedgmen Aaron wrote: > For anyone encountering the same problem, I found the solution was to set the > max oversampling factor to a lower value than the default. A value of 3 > provided suitable results for the raster layers and CRSs I'm working with. > > From looking at the GeoTools source code, the default value is 30 in version > GeoTools 22.1 (used in GeoServer 2.18.2) and 10000 in earlier versions of > GeoTools (used in GeoServer versions 2.16.1 to 2.18.1). > > The max oversampling factor is set as a java option in the GeoServer startup > script (this is covered in the GeoServer user guide), e.g. > -Dorg.geotools.coverage.max.oversample=3. > > Regards, > > Aaron Sedgmen. > > -----Original Message----- > From: Sedgmen Aaron <aaron.sedg...@ga.gov.au> > Sent: Wednesday, 3 March 2021 10:23 AM > To: geoserver-users@lists.sourceforge.net > Subject: Re: [Geoserver-users] Gaps in tiled WMS raster layers [SEC=OFFICIAL] > > Yes, it does look similar. I tried changing between JAI-EXT and JAI which > was suggested as a possible source of the problem in GEOS-9016, to no avail. > > This is looking like a bug so will log a ticket. > > Regards, > > Aaron Sedgmen. > > > > -----Original Message----- > From: Richard Duivenvoorde <rdmaili...@duif.net> > Sent: Monday, 1 March 2021 8:25 PM > To: geoserver-users@lists.sourceforge.net > Subject: Re: [Geoserver-users] Gaps in tiled WMS raster layers [SEC=OFFICIAL] > > This looks like an earlier issue I had in 2.14: > > https://osgeo-org.atlassian.net/jira/software/c/projects/GEOS/issues/GEOS-9016 > > which 'disappeared' after some newer release of 2.14.1.... > > Regards, > > Richard Duivenvoorde > > PS the demo page on duif.net is not there anymore... > > On 3/1/21 6:14 AM, Sedgmen Aaron wrote: >> @Olysterthanks for the advice. Unfortunately it hasn't resolved the >> problem. I've tried a range of metatile and gutter size combinations and it >> doesn't appear to make a difference. >> >> >> >> To illustrate the problem, this is a screenshot of the spearfish dem raster >> layer in QGIS, 512x512 tiles, EPSG:4326 (GeoServer is reprojecting the data >> from EPSG:26713), zoomed in to a scale of 1:500. The default interpolation >> method for the layer is set to bilinear in GeoServer. >> >> >> >> >> >> Regards, >> >> >> >> Aaron Sedgmen. >> >> >> >> -----Original Message----- >> From: Olyster <gagnon_oliv...@outlook.com> >> Sent: Saturday, 27 February 2021 12:15 AM >> To: geoserver-users@lists.sourceforge.net >> Subject: Re: [Geoserver-users] Gaps in tiled WMS raster layers [SEC=OFFICIAL] >> >> >> >> Hi, >> >> >> >> have a look at default meta tile size and default gutter size in caching >> settings. >> >> >> >> For example, I use 1 X 1 metatile with 10 gutter size. >> >> >> >> Hope this helps >> >> >> >> >> >> >> >> -- >> >> Sent from: http://osgeo-org.1560.x6.nabble.com/GeoServer-User-f3786390.html >> <http://osgeo-org.1560.x6.nabble.com/GeoServer-User-f3786390.html> >> >> >> >> >> >> _______________________________________________ >> >> Geoserver-users mailing list >> >> >> >> Please make sure you read the following two resources before posting to this >> list: >> >> - Earning your support instead of buying it, but Ian Turton: >> http://www.ianturton.com/talks/foss4g.html#/ >> <http://www.ianturton.com/talks/foss4g.html#/> >> >> - The GeoServer user list posting guidelines: >> http://geoserver.org/comm/userlist-guidelines.html >> <http://geoserver.org/comm/userlist-guidelines.html> >> >> >> >> If you want to request a feature or an improvement, also see this: >> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer >> >> <https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer> >> >> >> >> >> >> Geoserver-users@lists.sourceforge.net >> <mailto:Geoserver-users@lists.sourceforge.net> >> >> https://lists.sourceforge.net/lists/listinfo/geoserver-users >> <https://lists.sourceforge.net/lists/listinfo/geoserver-users> >> >> >> Geoscience Australia Disclaimer: This e-mail (and files transmitted with it) >> is intended only for the person or entity to which it is addressed. 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